| Project/Area Number |
26660148
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Wood science
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
Kubo Satoshi 国立研究開発法人 森林総合研究所, バイオマス化学研究領域, チーム長 (50399375)
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| Co-Investigator(Kenkyū-buntansha) |
HASHIDA Koh 国立研究開発法人森林総合研究所, バイオマス化学研究領域, 主任研究員 (40353809)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | リグニン / 異性化 / 熱特性 / 単離リグニン / 立体構造 |
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| Outline of Final Research Achievements |
Relationships between stereoisomerism of lignin side chain structure and their thermal properties were examined using low molecular weight beta-O-4 type dimer (GG) and high molecular weight milled wood lignin (MWL). cis-trans Isomer ratio ([Z]/[E]) of enol-ether, which was formed by the thermal treatment in the ionic liquid (IL) and alkaline medium of GG, was changed by UV irradiation. By this photo isomerization, melting temperature of GG could be reduced. These results would indicate that the thermal properties of low molecular weight lignin could be changed by IL or alkaline treatment followed by UV irradiation. By contrast, glass transition temperature of MWL, which was similarly treated in IL, was not reduced by UV irradiation. Photo isomerization rate of MWL was much slower than that of GG. For modifying the thermal properties of high molecular weight lignin by photo isomerization, further improvement in the isomerization process is required.
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